Troubleshooting DpeNanoServices under Windows
Command line start error message: “Access to the registry key 'HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\DAVID\Registry' is denied”

This error occurs when DpeNanoService want to create the mentioned Registry Key as normal user without admin rights.
Please check if you have any of the following dependencies:
Local DigaSystem installation with access to the DigaSystem Parameter files
Create the missing Registry Keys
Create a valid DigaSystemRegistry.xml in the DpeNanoSercices application directory
Also see How and Where DigaSystem parameter files are searched